"This man has been involved in some very serious criminal activity in the past few weeks," Montgomery County Police Chief, Thomas Manger said in a news conference Wednesday morning. "We fear for the safety of our officers who are responsible for bringing him back to the county."

William's body was found at 9:11 a.m. in the woods off of Route 121, near I-270 in Clarksburg, Tuesday.

Police confirmed, in Wednesday's news conference, the body they found is William McQuain's.

Police also said they reviewed video taken at a nearby gas station of Lopez and William. William did not appear to be in any distress in that video, police said.

Bobby Wheeler, who owns the Liberty Gas Station on Clarksburg Road says William gets out of the car and rolls around on his "wheelie" shoes, while his stepdad goes inside and pays $20 for gas.

Police were back out where they found William's body. It's just feet from the gas station. Chief Manger says William may have been murdered there in the woods. It may have been just minutes after the surveillance video showed him with his stepdad.

An autopsy on William's body will be performed Wednesday morning, to figure out exactly how the boy died.

Police are not saying when or how Lopez will be transferred back to Montgomery County.